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Biological Trace Element Research

, Volume 143, Issue 1, pp 507–517 | Cite as

Silicon Improves the Tolerance of Wheat Seedlings to Ultraviolet-B Stress

  • Xiaoqin YaoEmail author
  • Jianzhou Chu
  • Kunzheng Cai
  • Long Liu
  • Jiandong Shi
  • Wenyue Geng
Article

Abstract

Enhanced ultraviolet-B (UV-B) irradiation is one of the most important abiotic stresses that could influence the growth and physiological traits of plants. In this work, we reported the effects of silicon on the growth and physiological characteristics of wheat seedlings (Triticum aestivum L. cv Hengmai5229) subject to UV-B stress. Treatments with silicon significantly increased total biomass and chlorophyll (a + b) content, and reduced malondialdehyde (MDA) content and the rate of superoxide radical (O 2 ) production in wheat seedlings subjected to UV-B stress. Silicon treatments also induced an increased in soluble sugar, anthocyanins, and flavonoid content. Leaf silicon concentration increased with the increasing of silicon supply to soil. Positive correlations were found in leaf silicon concentration with total biomass, chlorophyll (a + b), proline, and soluble protein content, respectively. MDA content and the rate of O 2 production were negatively correlated with leaf silicon concentration in seedlings. The results demonstrated that silicon alleviated the damage caused by UV-B on wheat seedlings to some extent by the increase in antioxidant compounds content and leaf silicon concentration.

Keywords

Enhanced UV-B Silicon Wheat Malondialdehyde The rate of superoxide radical production 

Notes

Acknowledgements

This study was supported by the China Postdoctoral Science Foundation (20100470986) and the Open Fund of Key Laboratory of Ecological Agriculture of Ministry of Agriculture (2009k12).

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Xiaoqin Yao
    • 1
    • 2
    Email author
  • Jianzhou Chu
    • 1
  • Kunzheng Cai
    • 2
  • Long Liu
    • 1
  • Jiandong Shi
    • 1
  • Wenyue Geng
    • 1
  1. 1.The College of Life SciencesHebei UniversityBaodingChina
  2. 2.Key Laboratory of Ecological Agriculture of Ministry of AgricultureSouth China Agricultural UniversityGuangzhouChina

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